Ok, I'm all about finding new settings for fantasy and apocalyptic plots, but a 18 y/o k-pop singer with ear piercings can't possibly pass for a young priest and exorcist. Trained at the Vatican 
It was already a long shot with Keanu Reeves in Constantine, though at least that character was a desperate middle-aged man.
#island #k-drama #kdrama #amazonprimevideo #kpop #astro #chaeunwoo